yes theres something wrong with zonealarm and 99% of software firewalls their all vournable to packet hack's might not think much of it but just by changing few simple packets you could gain acess to many things that might be on someones pc (web servers,gaming servers) or even read peoples url's or if you run something like netmeeting or pc anywhere someone could actualy get past the password ya put and take control and most software firewalls wont detect these things. firewall i use is ISA would not have it any different